Matrix properties
number of rows	148,770
number of columns	148,770
nonzeros	10,641,602
structural full rank?	yes
structural rank	148,770
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	2,400
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	S. Mayer
editor	J. Koster
date	2004
kind	structural problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	90,924,001
Cholesky flop count	1.1e+11
nnz(L+U), no partial pivoting, with AMD	181,699,232
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	158,509,398
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	308,970,286

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 2400 explicit zero entries.

For a description of the statistics displayed above, click here.

Maintained by Tim Davis, last updated 12-Mar-2014.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.